Is There Fungus Among Us? Presence and absence of mycorrhizæ fungus in California sage scrub

1. Is There Fungus Among Us?Presence and absence of mycorrhizæ fungus in California sage scrub Mystyn Mills & Paola DucoingChaho California State University Long Beach Department of Geography

2. What Is Limiting CSS Re-Establishment? • Prevalence of non-natives • Anthropogenic disturbances • ???? • What about fungus?

3. ArbuscularMycorrhizæ Fungi (AM) • Glomeromycete fungi, inhabiting the soil and plant roots • Only 230 species described, ~85 new species in last decade • AM fungi crucial components of terrestrial ecosystems, assisting plants in uptake of water and limiting nutrients Symbiosis structure between AM fungi and plant roots Allen 1991; Brundett 2008; Sturmer, 2012

4. ArbuscularMycorrhizæ Fungi (AM) • AM fungi recognize specific host plants and will not form infection structures with inappropriate hosts • May be especially critical in harsh abiotic conditions • Research on AM fungi has remained relatively sparse for a variety of reasons Sapling with AM fungi symbiosis Brundett 2008; Cripps and Eddington 2005; Gionannetti et al. 1994

5. Our Research Question • Is a degraded state of AM fungi multualisms with native CSS species limiting the successful re-establishment of CSS? • And • Does disturbance reduce AM presence/abundance in native species? • Do non-Natives reduce AM presence/abundance?

6. Non-Natives • Mycorrhizæmay strongly mediate competition between invasives and natives • Most non-native grasses that occur in California are not reliant on mycorrhizal mutualism Green Spurge (Euphorbia esula) • Presence of non-natives may significantly affect soil dynamics; reduce/eliminate AM populations   Vogelsangand Bever, 2009

7. Disturbance • Anthropogenic soil disturbances may significantly affect AM populations • Break-up mycorrhizæhyphalnetworks • AM affected by severe soil disturbance even after disturbance stops Alguacilet al. 2008; Jasper et al. 1989; Alguacil et al. 2008; Stahl et al. 1988

8. Goals • Determine if there is a difference in AM fungi presence (and composition (eventually)) among non-native and native plants, and disturbed vs. undisturbed sites • Provide restoration managers with knowledge of AM fungi dynamics to help inform restoration decisions • Develop a protocol for collection and processing of samples

9. What We Did (and will continue to do) • A census of the presence and abundance of AM fungi by: • Collecting “rootballs” from native and non-native species • Collecting “rootballs” from undisturbed and disturbed sites • Keep really good notes

10. Field Collection “Undisturbed” VS “Disturbed”

11. Field Collection Native VS Non-Native California sunflower (Enceliacalifornica)

12. In the Laboratory • Wash root balls in water   • Chop into ~2 cm long segments • Place loosely in biopsy tissue cassettes • Potassium hydroxide (KOH) 10% solution • Autoclave at 121 C for 45 minutes to clear roots (liquid cycle) • India ink and vinegar

13. Preliminary Findings Disturbed black sage (Salvia mellifera) Undisturbed black sage (Salvia mellifera) Brundett 2008

14. Preliminary Findings Fennel (Foeniculumvulgare) Black Mustard (Brassica nigra) Dandelion (Taraxacumofficinale) Fountain Grass (Pennisetumsetaceum)

15. Discussion • Preliminary findings suggest that natives from disturbed sites have less AM • Also non-native species collected have little to none • Need to inoculate when restoring? • Does inoculation with non-native species work? Does it diminish already impacted native AM populations? • Continue research. . .

16. What Can Be Done • Understanding of AM fungi and plant dynamics has the potential to help improve restoration success • Information on AM fungi dynamics for restoration (and conservation) managers • Pamphlet with native AM fungi and host species for organizations such as California Native Plant Society • Development of a lab protocol

17. Future Research • Continue with the current project • Identify to family/species • Look at AM spores in the soil • Explore the relationship between non-native AM and native AM • Similar study conducted in different locations with CSS • Similar study conducted in California native grasslands and/or other native habitats • Etc.

18. Thank You! Special Thank You to: Drs. Rodrigue, Whitcraft, and Laris Maggie Munoz-Perez The rest of the CSULB Geography Dept. Mike Riney Palos Verdes Peninsula Land Conservancy

19. Works Cited Alguacil, M.M., Lumini, E., Roldan, A., Salinas-Garcia, J.R., Bonfante, P., Bianciotto, V., 2008. The impact of tillage practices on arbuscularmycorhizal fungal diversity in subtropical soils. Ecological Applications 18, 527-536. Allen, M. F., 1991. The Ecology of Mycorrhizae. Cambridge: Cambridge University Press Brundrett MC. 2008. Mycorrhizal Associations: The Web Resource.http://mycorrhizas.info/info.html (accessed 10 March 2013). Cripps, Cathy L. and Eddington, Leslie H., 2005. Distribution of mycorrhizal types among alpine vascular plant families on the Beartooth Plateau, Rocky Mountains, U.S.A. Arctic, Antarctic, and Alpine Research, 37, 2: 177-188. Giovannett, M., Sbrana, C., Logi, C. 1994. Early processes involved in host recognition by arbuscularmycorrhizal fungi. New Phytologist. 127, 4: 703-709 International Culture Collection of (Vesicular) ArbuscularMycorrhizal Fungi. http://invam.caf.wvu.edu/ Jasper, D.A., Abbott, L. K., Robson, A.D. 1989. Soil disturbance reduces the infectivity of external hyphae of vesicular-arbuscularmycorrhizal fungi. New Phytologist 112, 1:93-99 Stahl, P., Williams, S.E., Christensen, M. 2012. Efficacy of native vesicular-arbuscularmycorrhizal fungi after severe soil disturbance. New Phytologist. 110, 3:347-354 Sturmer, S. L., Sturmer, R., Pasqualini, D, 2013. Taxonomic diversity and community structure of arbuscularmycorrhizal fungi (Phylum Glomeromycota) in three maritime sand dunes in Santa Catarina state, south Brazil. Fungal Ecology, 6, 27-36. Vogelsang, Keith M., and Bever, James D. 2009. Mycorrhizal densities decline in association with nonnative plants and contribute to plant invasion. Ecology 90, 2: 399-407